using syncoid to backup ZFS snapshots – home assistant

Copies of data are good. Especially if on a different host. zfs snapshots combined with zfs send | zfs recv make replication of zfs file systems especially easy. I am already using sanoid to manage zfs snapshots. Now I’m going to use syncoid to transfer those snapshots to another host. Both sanoid and syncoid are provided by the sanoid package on FreeBSD. I’m sure any other packaging system does similar.

In this post:

  1. FreeBSD 13.1-RELEASE
  2. sanoid-2.1.0
  3. zfs-2.1.4-FreeBSD_g52bad4f23
  4. zfs-kmod-2.1.4-FreeBSD_g52bad4f23

… not that the last two items matter much for this solution.

Getting started

From https://bsd.network/web/@mikael@hachyderm.io/109558914891433862

On both hosts, create a new user: syncoid – easy to know what that user does. For tasks with special purposes, I like to use dedicated users instead of my own user login, which has additional permissions not required for the task.

NOTE: I originally created system/backups-by-snapshot/syncoid and then hit an error (you’ll see it way far below). That’s when I destroyed it and created system/backups-by-snapshot/syncoid instead. I did a find/replace on this text, but there might be lingering inconsistencies. For that, I apologize.

Receiving host

On the host to receive backups :

[knew dan ~] % sudo zfs create system/backups-by-snapshot/syncoid

NOTE: For my situation, I am making use of syncoid‘s use of sudo. To get there, I went through a trial-and-error series. This came to light in a reddit post. If using delegation, then this command is needed:

[knew dan ~] % sudo zfs allow -u syncoid create,mount,receive system/backups-by-snapshot/syncoid

Later, when invoking syncoid, I could use the –no-privilege-elevation argument to avoid invoking sudo. I went with the sudo option.

Sending host

On the host with data to be backed up:

[slocum dan ~] % sudo zfs allow -u syncoid send,snapshot system/vm/hass

Trial and error starts here

WARNING: this post has a lot of repetitive and boring back & forth while I work out the sudo permissions required for this task. You can skip past that with this link.

First attempt:

[syncoid@slocum ~]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid
Sorry, try again.
Sorry, try again.
WARN: ZFS resume feature not available on source and target machine - sync will continue without resume support.
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
CRITICAL ERROR: no datasets found at /usr/local/bin/syncoid line 155.
[syncoid@slocum ~]$ 

Over on the other server, I see

Dec 22 20:53:18 slocum sshd[81151]: Accepted publickey for syncoid from 2001:470:[redacted] port 44679 ssh2: ED25519 SHA256:dWlFwnmLIddJLGsbe3QPiTYMBi257cgtGVNEJDvjTPY
Dec 22 20:53:18 slocum sudo[81187]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 20:53:18 slocum syslogd: last message repeated 2 times
Dec 22 20:53:18 slocum sudo[81187]:  syncoid : user NOT in sudoers ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zpool get -o value -H feature@extensible_dataset system
Dec 22 20:53:18 slocum sudo[81194]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 20:53:18 slocum syslogd: last message repeated 2 times
Dec 22 20:53:18 slocum sudo[81194]:  syncoid : user NOT in sudoers ; TTY=pts/3 ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zpool get -o value -H feature@extensible_dataset system
Dec 22 20:53:18 slocum sudo[81203]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 20:53:18 slocum syslogd: last message repeated 2 times
Dec 22 20:53:18 slocum sudo[81203]:  syncoid : user NOT in sudoers ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs list -o name,origin -t filesystem,volume -Hr system/vm/hass
Dec 22 20:53:18 slocum sshd[81166]: Received disconnect from 2001:470:[redacted] port 44679:11: disconnected by user
Dec 22 20:53:18 slocum sshd[81166]: Disconnected from user syncoid 2001:470:[redacted] port 44679

Looks like i need some sudopermissions over there. I added this to /usr/local/etc/sudoers.d/anvil.

syncoid   ALL=(ALL) NOPASSWD:/sbin/zpool get -o value -H feature@extensible_dataset system
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs list -o name,origin -t filesystem,volume -Hr system/vm/hass

Trying the command again, I see:

Dec 22 20:58:59 slocum sudo[95645]:  syncoid : /usr/local/etc/sudoers.d/syncoid:2:53: syntax error
Dec 22 20:58:59 slocum sudo[95645]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zpool get -o value -H feature@extensible_dataset system
Dec 22 20:58:59 slocum sudo[95653]:  syncoid : /usr/local/etc/sudoers.d/syncoid:2:53: syntax error
Dec 22 20:58:59 slocum sudo[95653]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 20:58:59 slocum syslogd: last message repeated 2 times
Dec 22 20:58:59 slocum sudo[95653]:  syncoid : command not allowed ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs list -o name,origin -t filesystem,volume -Hr system/vm/hass

Those commas need to be escaped:

syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs list -o name\,origin -t filesystem\,volume -Hr system/vm/hass

Now they parse:

[slocum dan /usr/local/etc/sudoers.d] % sudo visudo -cf /usr/local/etc/sudoers.d/syncoid
/usr/local/etc/sudoers.d/syncoid: parsed OK

Repeating the command:

[syncoid@knew ~/.ssh]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid
Sorry, try again.
Sorry, try again.
WARN: ZFS resume feature not available on target machine - sync will continue without resume support.
ERROR: Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts

this is what I see:

Dec 22 21:07:20 slocum sudo[48675]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zpool get -o value -H feature@extensible_dataset system
Dec 22 21:07:20 slocum sudo[48677]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs list -o name,origin -t filesystem,volume -Hr system/vm/hass
Dec 22 21:07:20 slocum sudo[48679]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 21:07:20 slocum syslogd: last message repeated 2 times
Dec 22 21:07:20 slocum sudo[48679]:  syncoid : command not allowed ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -H syncoid:sync system/vm/hass

I added a new command to /usr/local/etc/sudoers.d/syncoid. Note the : is escaped.

syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -H syncoid\:sync system/vm/hass

Time to try again:

[syncoid@knew ~/.ssh]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid
Sorry, try again.
Sorry, try again.
WARN: ZFS resume feature not available on target machine - sync will continue without resume support.
Sorry, try again.
Sorry, try again.
snapshot listing failed, trying fallback command at /usr/local/bin/syncoid line 1606.
bash: line 1: syncoid@slocum.example.org: command not found
CRITICAL ERROR: snapshots couldn't be listed for system/vm/hass (exit code 32512) at /usr/local/bin/syncoid line 1610.
[syncoid@knew ~/.ssh]$ 

With this on the other server:

Dec 22 21:15:10 slocum sudo[66944]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zpool get -o value -H feature@extensible_dataset system
Dec 22 21:15:10 slocum sudo[66949]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs list -o name,origin -t filesystem,volume -Hr system/vm/hass
Dec 22 21:15:10 slocum sudo[66951]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -H syncoid:sync system/vm/hass
Dec 22 21:15:10 slocum sudo[66953]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 21:15:10 slocum syslogd: last message repeated 2 times
Dec 22 21:15:10 slocum sudo[66953]:  syncoid : command not allowed ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -Hpd 1 -t snapshot guid,creation system/vm/hass

Another command to permit, with a comma to escape:

syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -Hpd 1 -t snapshot guid\,creation system/vm/hass

One more time:

[syncoid@knew ~/.ssh]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid
Sorry, try again.
Sorry, try again.
WARN: ZFS resume feature not available on target machine - sync will continue without resume support.
Sorry, try again.
Sorry, try again.
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
CRITICAL ERROR: ssh    -i ~syncoid/.ssh/id_ed25519 -S /tmp/syncoid-syncoid@slocum.example.org-1671743927 syncoid@slocum.example.org 'sudo zfs send  '"'"'system/vm/hass'"'"'@'"'"'autosnap_2022-12-13_00:03:00_daily'"'"' | lzop  | mbuffer  -q -s 128k -m 16M 2>/dev/null' | mbuffer  -q -s 128k -m 16M 2>/dev/null | lzop -dfc | sudo zfs receive   -F 'system/backups-by-snapshot/syncoid' failed: 256 at /usr/local/bin/syncoid line 492.
[syncoid@knew ~/.ssh]$ 

with:

Dec 22 21:18:47 slocum sudo[75695]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zpool get -o value -H feature@extensible_dataset system
Dec 22 21:18:47 slocum sudo[75697]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs list -o name,origin -t filesystem,volume -Hr system/vm/hass
Dec 22 21:18:47 slocum sudo[75700]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -H syncoid:sync system/vm/hass
Dec 22 21:18:47 slocum sudo[75705]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -Hpd 1 -t snapshot guid,creation system/vm/hass
Dec 22 21:18:47 slocum sudo[75709]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 21:18:47 slocum syslogd: last message repeated 2 times
Dec 22 21:18:47 slocum sudo[75709]:  syncoid : command not allowed ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs send -nvP system/vm/hass@autosnap_2022-12-13_00:03:00_daily
Dec 22 21:18:47 slocum sudo[75711]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 21:18:47 slocum syslogd: last message repeated 2 times
Dec 22 21:18:47 slocum sudo[75711]:  syncoid : command not allowed ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs send system/vm/hass@autosnap_2022-12-13_00:03:00_daily

Are you still reading? One more time:

[syncoid@knew ~/.ssh]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid
Sorry, try again.
Sorry, try again.
WARN: ZFS resume feature not available on target machine - sync will continue without resume support.
Sorry, try again.
Sorry, try again.
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
CRITICAL ERROR: ssh    -i ~syncoid/.ssh/id_ed25519 -S /tmp/syncoid-syncoid@slocum.example.org-1671744031 syncoid@slocum.example.org 'sudo zfs send  '"'"'system/vm/hass'"'"'@'"'"'autosnap_2022-12-13_00:03:00_daily'"'"' | lzop  | mbuffer  -q -s 128k -m 16M 2>/dev/null' | mbuffer  -q -s 128k -m 16M 2>/dev/null | lzop -dfc | sudo zfs receive   -F 'system/backups-by-snapshot/syncoid' failed: 256 at /usr/local/bin/syncoid line 492.
Dec 22 21:20:32 slocum sudo[79758]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zpool get -o value -H feature@extensible_dataset system
Dec 22 21:20:32 slocum sudo[79761]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs list -o name,origin -t filesystem,volume -Hr system/vm/hass
Dec 22 21:20:32 slocum sudo[79772]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -H syncoid:sync system/vm/hass
Dec 22 21:20:32 slocum sudo[79776]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -Hpd 1 -t snapshot guid,creation system/vm/hass
Dec 22 21:20:32 slocum sudo[79781]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs send -nvP system/vm/hass@autosnap_2022-12-13_00:03:00_daily
Dec 22 21:20:32 slocum sudo[79785]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 21:20:32 slocum syslogd: last message repeated 2 times
Dec 22 21:20:32 slocum sudo[79785]:  syncoid : command not allowed ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs send system/vm/hass@autosnap_2022-12-13_00:03:00_daily

I added this command:

syncoid ALL=(ALL) NOPASSWD:/sbin/zfs send -nvP system/vm/hass@autosnap_*

Again:

[syncoid@knew ~/.ssh]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid
Sorry, try again.
Sorry, try again.
WARN: ZFS resume feature not available on target machine - sync will continue without resume support.
Sorry, try again.
Sorry, try again.
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
mbuffer: error: outputThread: error writing to  at offset 0x10000: Broken pipe
mbuffer: warning: error during output to : Broken pipe
warning: cannot send 'system/vm/hass@autosnap_2022-12-13_00:03:00_daily': signal received
CRITICAL ERROR: ssh    -i ~syncoid/.ssh/id_ed25519 -S /tmp/syncoid-syncoid@slocum.example.org-1671744190 syncoid@slocum.example.org 'sudo zfs send  '"'"'system/vm/hass'"'"'@'"'"'autosnap_2022-12-13_00:03:00_daily'"'"' | lzop  | mbuffer  -q -s 128k -m 16M 2>/dev/null' | mbuffer  -q -s 128k -m 16M 2>/dev/null | lzop -dfc | sudo zfs receive   -F 'system/backups-by-snapshot/syncoid' failed: 256 at /usr/local/bin/syncoid line 492.

with:

Dec 22 21:23:10 slocum sudo[85925]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zpool get -o value -H feature@extensible_dataset system
Dec 22 21:23:10 slocum sudo[85927]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs list -o name,origin -t filesystem,volume -Hr system/vm/hass
Dec 22 21:23:10 slocum sudo[85931]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -H syncoid:sync system/vm/hass
Dec 22 21:23:10 slocum sudo[85933]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -Hpd 1 -t snapshot guid,creation system/vm/hass
Dec 22 21:23:10 slocum sudo[85935]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs send -nvP system/vm/hass@autosnap_2022-12-13_00:03:00_daily
Dec 22 21:23:10 slocum sudo[85938]:  syncoid : PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs send system/vm/hass@autosnap_2022-12-13_00:03:00_daily

So everything on the other host worked. Let’s check this host:

Dec 22 21:26:00 knew syslogd: last message repeated 2 times
Dec 22 21:26:00 knew sudo[45522]:  syncoid : user NOT in sudoers ; TTY=pts/0 ; PWD=/usr/home/syncoid/.ssh ; USER=root ; COMMAND=/sbin/zpool get -o value -H feature@extensible_dataset system
Dec 22 21:26:00 knew sudo[45531]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 21:26:00 knew syslogd: last message repeated 2 times
Dec 22 21:26:00 knew sudo[45531]:  syncoid : user NOT in sudoers ; TTY=pts/0 ; PWD=/usr/home/syncoid/.ssh ; USER=root ; COMMAND=/sbin/zfs get -H name system/backups-by-snapshot/syncoid
Dec 22 21:26:00 knew sudo[45543]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 21:26:00 knew syslogd: last message repeated 2 times
Dec 22 21:26:00 knew sudo[45543]:  syncoid : user NOT in sudoers ; TTY=pts/0 ; PWD=/usr/home/syncoid/.ssh ; USER=root ; COMMAND=/sbin/zfs receive -F system/backups-by-snapshot/syncoid

Trying that again:

[syncoid@knew ~/.ssh]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid
Sorry, try again.
Sorry, try again.
ERROR getzfsvalue system/backups-by-snapshot/syncoid receive_resume_token: sudo: 3 incorrect password attempts

Sorry, try again.
Sorry, try again.
snapshot listing failed, trying fallback command at /usr/local/bin/syncoid line 1606.
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
CRITICAL ERROR: snapshots couldn't be listed for system/backups-by-snapshot/syncoid (exit code 256) at /usr/local/bin/syncoid line 1610.
[syncoid@knew ~/.ssh]$ 

So let’s what’s next:

Dec 22 21:28:01 knew sudo[45869]:  syncoid : command not allowed ; TTY=pts/0 ; PWD=/usr/home/syncoid/.ssh ; USER=root ; COMMAND=/sbin/zfs get -H receive_resume_token system/backups-by-snapshot/syncoid
Dec 22 21:28:01 knew sudo[45871]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 21:28:01 knew syslogd: last message repeated 2 times
Dec 22 21:28:01 knew sudo[45871]:  syncoid : command not allowed ; TTY=pts/0 ; PWD=/usr/home/syncoid/.ssh ; USER=root ; COMMAND=/sbin/zfs get -Hpd 1 -t snapshot guid,creation system/backups-by-snapshot/syncoid
Dec 22 21:28:01 knew sudo[45872]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 21:28:01 knew syslogd: last message repeated 2 times
Dec 22 21:28:01 knew sudo[45872]:  syncoid : command not allowed ; TTY=pts/0 ; PWD=/usr/home/syncoid/.ssh ; USER=root ; COMMAND=/sbin/zfs get -Hpd 1 type,guid,creation system/backups-by-snapshot/syncoid

Again:

[syncoid@knew ~/.ssh]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid
Sorry, try again.
Sorry, try again.
ERROR getzfsvalue system/backups-by-snapshot/syncoid -p used: sudo: 3 incorrect password attempts

CRITICAL ERROR: bookmarks couldn't be listed for system/vm/hass (exit code 256) at /usr/local/bin/syncoid line 1700.

with:

Dec 22 21:30:03 knew sudo[46437]:  syncoid : command not allowed ; TTY=pts/0 ; PWD=/usr/home/syncoid/.ssh ; USER=root ; COMMAND=/sbin/zfs get -H -p used system/backups-by-snapshot/syncoid

At least the messages are getting shorter:

[syncoid@knew ~/.ssh]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid
CRITICAL ERROR: bookmarks couldn't be listed for system/vm/hass (exit code 256) at /usr/local/bin/syncoid line 1700.

This time, all clear on knew, let’s check slocum:

Dec 22 21:31:40 slocum sudo[9776]:  syncoid : command not allowed ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -Hpd 1 -t bookmark guid,creation system/vm/hass

OK, this, with another escape:

syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -Hpd 1 -t bookmark guid\,creation system/vm/hass

Here we are, the big moment! Notice that this command is slight different. because. history.

This error message is what appeared and does not match the above command exactly, because of filesystem name changes earlier explained.

[syncoid@knew ~/.ssh]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/homeassistant

CRITICAL ERROR: Target system/backups-by-snapshot/homeassistant exists but has no snapshots matching with system/vm/hass!
                Replication to target would require destroying existing
                target. Cowardly refusing to destroy your existing target.

          NOTE: Target system/backups-by-snapshot/homeassistant dataset is < 64MB used - did you mistakenly run
                `zfs create system/backups-by-snapshot/homeassistant ` on the target? ZFS initial
                replication must be to a NON EXISTENT DATASET, which will
                then be CREATED BY the initial replication process.

[syncoid@knew ~/.ssh]$ 

This is where I went back and destroyed system/backups-by-snapshot/homeassistant and created system/backups-by-snapshot/syncoid

After creating the new filesystem, I ran an amended command:

[syncoid@knew ~]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid/homeassistant
Sorry, try again.
Sorry, try again.
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
mbuffer: error: outputThread: error writing to  at offset 0x10000: Broken pipe
mbuffer: warning: error during output to : Broken pipe
warning: cannot send 'system/vm/hass@autosnap_2022-12-13_00:03:00_daily': signal received
CRITICAL ERROR: ssh    -i ~syncoid/.ssh/id_ed25519 -S /tmp/syncoid-syncoid@slocum.example.org-1671745437 syncoid@slocum.example.org 'sudo zfs send  '"'"'system/vm/hass'"'"'@'"'"'autosnap_2022-12-13_00:03:00_daily'"'"' | lzop  | mbuffer  -q -s 128k -m 16M 2>/dev/null' | mbuffer  -q -s 128k -m 16M 2>/dev/null | lzop -dfc | sudo zfs receive  -s -F 'system/backups-by-snapshot/syncoid/homeassistant' failed: 256 at /usr/local/bin/syncoid line 492.

These are the errors:

Dec 22 21:43:57 knew sudo[51756]:  syncoid : command not allowed ; TTY=pts/0 ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs get -H name system/backups-by-snapshot/syncoid/homeassistant
Dec 22 21:43:58 knew sudo[51764]: pam_ssh_agent_auth: Failed Authentication: `syncoid' as `syncoid' using /home/syncoid/.ssh/authorized_keys
Dec 22 21:43:58 knew syslogd: last message repeated 2 times
Dec 22 21:43:58 knew sudo[51764]:  syncoid : command not allowed ; TTY=pts/0 ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs receive -s -F system/backups-by-snapshot/syncoid/homeassistant

One of those replaces an existing entry I think. The other is new. I will show the completed set near the end of this post.

Now waiting for this to finish:

[syncoid@knew ~]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid/homeassistant

It's coming in:

[knew dan ~] % zfs list system/backups-by-snapshot/syncoid/homeassistant
NAME                                               USED  AVAIL     REFER  MOUNTPOINT
system/backups-by-snapshot/syncoid/homeassistant  14.3G  18.9T     14.3G  /usr/home/ansel/snapshots/syncoid/homeassistant
[knew dan ~] % zfs list system/backups-by-snapshot/syncoid/homeassistant
NAME                                               USED  AVAIL     REFER  MOUNTPOINT
system/backups-by-snapshot/syncoid/homeassistant  14.7G  18.9T     14.7G  /usr/home/ansel/snapshots/syncoid/homeassistant
[knew dan ~] % 

I saw this happen. These are my regular snapshots going off and getting interrupted by syncoid.

cannot create snapshot 'system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_21:54:04_hourly': dataset is busy
CRITICAL ERROR: zfs snapshot system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_21:54:04_hourly failed, 256 at /usr/local/bin/sanoid line 627.
cannot create snapshot 'system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_21:54:04_frequently': dataset is busy
CRITICAL ERROR: zfs snapshot system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_21:54:04_frequently failed, 256 at /usr/local/bin/sanoid line 627.

And it failed:

[syncoid@knew ~]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid/homeassistant
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
cannot receive: failed to read from stream
CRITICAL ERROR: ssh    -i ~syncoid/.ssh/id_ed25519 -S /tmp/syncoid-syncoid@slocum.example.org-1671745695 syncoid@slocum.example.org 'sudo zfs send  -I '"'"'system/vm/hass'"'"'@'"'"'autosnap_2022-12-13_00:03:00_daily'"'"' '"'"'system/vm/hass'"'"'@'"'"'autosnap_2022-12-22_21:46:05_frequently'"'"' | lzop  | mbuffer  -q -s 128k -m 16M 2>/dev/null' | mbuffer  -q -s 128k -m 16M 2>/dev/null | lzop -dfc | sudo zfs receive  -s -F 'system/backups-by-snapshot/syncoid/homeassistant' failed: 256 at /usr/local/bin/syncoid line 528.
[syncoid@knew ~]$ 

Well, one more command:

Dec 22 21:57:13 slocum sudo[78650]:  syncoid : command not allowed ; PWD=/usr/home/syncoid ; USER=root ; COMMAND=/sbin/zfs send -I 
system/vm/hass@autosnap_2022-12-13_00:03:00_daily system/vm/hass@autosnap_2022-12-22_21:46:05_frequently

Added:

syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs send -I system/vm/hass@autosnap* system/vm/hass@autosnap_*

Trying again:

[syncoid@knew ~]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid/homeassistant
Sorry, try again.
Sorry, try again.
ERROR getzfsvalue system/backups-by-snapshot/syncoid/homeassistant receive_resume_token: sudo: 3 incorrect password attempts

Sorry, try again.
Sorry, try again.
snapshot listing failed, trying fallback command at /usr/local/bin/syncoid line 1606.
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
CRITICAL ERROR: snapshots couldn't be listed for system/backups-by-snapshot/syncoid/homeassistant (exit code 256) at /usr/local/bin/syncoid line 1610.
[syncoid@knew ~]$ 

and adding three more commands to the receiving host:

syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -H receive_resume_token system/backups-by-snapshot/syncoid/homeassistant
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -Hpd 1 -t snapshot guid\,creation system/backups-by-snapshot/syncoid/homeassistant
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -Hpd 1 type\,guid\,creation system/backups-by-snapshot/syncoid/homeassistant

Trying again:

[syncoid@knew ~]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid/homeassistant
Sorry, try again.
Sorry, try again.
ERROR getzfsvalue system/backups-by-snapshot/syncoid/homeassistant -p used: sudo: 3 incorrect password attempts

Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts
[syncoid@knew ~]$ 

I found two more:

syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -H -p used system/backups-by-snapshot/syncoid/homeassistant
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs rollback -R system/backups-by-snapshot/syncoid/homeassistant@autosnap_*

While I like specifying at least vaguely what the user can do with sudo, I wonder how fragile this is.

Let's try the command again.

[syncoid@knew ~]$ syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid/homeassistant
[syncoid@knew ~]$ 

No errors. :)

The cronjob I have:

[syncoid@knew ~]$ crontab -l
24 * * * * syncoid --sshkey=~syncoid/.ssh/id_ed25519 -r --no-sync-snap --compress=lzo --quiet syncoid@slocum.example.org:system/vm/hass system/backups-by-snapshot/syncoid/homeassistant

[syncoid@knew ~]$ 

Things to do: kill off the old snapshots.... and tell sanoid you don't have to snapshot it.

[syncoid@knew ~]$ zfs list -r -t snapshot system/backups-by-snapshot/syncoid/homeassistant
NAME                                                                                       USED  AVAIL     REFER  MOUNTPOINT
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_19:02:15_hourly       195M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_19:45:46_frequently   128M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_20:01:39_hourly       603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_20:01:39_frequently   603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_20:16:16_frequently   104M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_20:30:45_frequently   103M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_20:46:06_frequently   104M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_21:00:43_hourly         0B      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_21:00:43_frequently     0B      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_21:16:20_frequently   108M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_21:30:58_frequently   107M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_21:46:05_frequently   107M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_22:01:23_hourly       823K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_22:01:23_frequently   823K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-22_22:16:05_frequently     0B      -     32.0G  -
[syncoid@knew ~]$ 

The sudo permissions on the source

These are the sudo permissions required on the source (the host being backed up):

slocum dan ~] % cat /usr/local/etc/sudoers.d/syncoid
syncoid   ALL=(ALL) NOPASSWD:/sbin/zpool get -o value -H feature@extensible_dataset system
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs list -o name\,origin -t filesystem\,volume -Hr system/vm/hass
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -H syncoid\:sync system/vm/hass
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -Hpd 1 -t snapshot guid\,creation system/vm/hass
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs send -nvP system/vm/hass@autosnap_*
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs send system/vm/hass@autosnap_*
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -Hpd 1 -t bookmark guid\,creation system/vm/hass
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs send -I system/vm/hass@autosnap* system/vm/hass@autosnap_*
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs send -nvP -I system/vm/hass@autosnap_* system/vm/hass@autosnap_*

The sudo permissions don the destination

These are the sudo permissions required on the destination (the host accepting the backups):

[knew dan ~] % cat /usr/local/etc/sudoers.d/syncoid
syncoid   ALL=(ALL) NOPASSWD:/sbin/zpool get -o value -H feature@extensible_dataset system
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -H name system/backups-by-snapshot/syncoid/homeassistant
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs receive -F system/backups-by-snapshot/syncoid
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs receive -s -F system/backups-by-snapshot/syncoid/homeassistant
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -H receive_resume_token system/backups-by-snapshot/syncoid
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -Hpd 1 -t snapshot guid\,creation system/backups-by-snapshot/syncoid
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -H -p used system/backups-by-snapshot/syncoid
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -H receive_resume_token system/backups-by-snapshot/syncoid/homeassistant
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -Hpd 1 -t snapshot guid\,creation system/backups-by-snapshot/syncoid/homeassistant
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -Hpd 1 type\,guid\,creation system/backups-by-snapshot/syncoid/homeassistant
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs get -H -p used system/backups-by-snapshot/syncoid/homeassistant
syncoid   ALL=(ALL) NOPASSWD:/sbin/zfs rollback -R system/backups-by-snapshot/syncoid/homeassistant@autosnap_*

sanoid configuration on the destination

This is what I have in /usr/local/etc/sanoid/sanoid.conf which pertains to the backed up filesystems.

...
[system/backups-by-snapshot/syncoid/homeassistant]
    use_template          = homeassistant
    recursive             = yes
...
[template_homeassistant]
    frequently = 25
    hourly     = 96
    daily      = 45
    monthly    = 5
    autosnap   = no
    autoprune  = yes

Of not, this host create no snapshots on this dataset. It does prune, but it also keeps more snapshots than the original system does. This is what I have right now:

[knew dan ~] % zfs list -r -t snapshot system/backups-by-snapshot/syncoid/homeassistant
NAME                                                                                       USED  AVAIL     REFER  MOUNTPOINT
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-23_00:03:20_daily       2.88G      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-23_19:01:33_hourly       212M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-23_20:01:03_hourly       177M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-23_21:01:44_hourly       179M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-23_22:02:00_hourly       178M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-23_23:01:10_hourly       177M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_00:01:29_daily        603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_00:01:29_hourly       603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_01:01:06_hourly       172M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_02:01:44_hourly       176M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_03:01:43_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_04:00:58_hourly       178M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_05:01:06_hourly       180M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_06:02:11_hourly       170M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_07:02:29_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_08:02:27_hourly       171M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_09:00:57_hourly       173M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_10:00:45_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_11:01:27_hourly       177M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_12:02:20_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_13:01:54_hourly       174M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_14:01:31_hourly       172M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_15:00:32_hourly       174M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_16:01:08_hourly       176M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_17:01:47_hourly       176M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_18:02:43_hourly       177M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_19:00:27_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_20:01:50_hourly       176M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_21:02:36_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_22:01:33_hourly       174M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-24_23:01:27_hourly       173M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_00:02:27_daily        384K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_00:02:27_hourly       384K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_01:00:33_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_02:01:05_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_03:03:01_hourly       179M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_04:02:25_hourly       185M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_05:01:03_hourly       184M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_06:00:19_hourly       169M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_07:02:27_hourly       174M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_08:00:55_hourly       171M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_09:02:16_hourly       172M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_10:00:33_hourly       176M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_11:02:11_hourly       178M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_12:01:46_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_13:01:49_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_14:00:52_hourly       177M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_15:00:57_hourly       176M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_16:01:17_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_17:00:42_hourly       178M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_18:01:25_hourly       177M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_19:02:32_hourly       177M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_20:03:02_hourly       179M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_21:02:24_hourly       180M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_22:01:18_hourly       181M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-25_23:00:46_hourly       180M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_00:03:20_daily          0B      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_00:03:20_hourly         0B      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_01:01:27_hourly       181M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_02:01:55_hourly       180M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_03:03:13_hourly       184M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_04:03:23_hourly       193M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_05:01:49_hourly       193M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_06:01:53_hourly       175M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_07:01:45_hourly       180M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_08:00:56_hourly       180M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_09:02:01_hourly       176M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_10:01:44_hourly       179M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_11:01:12_hourly       181M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_12:00:57_hourly       176M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_13:00:32_hourly       177M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_14:01:07_hourly       178M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_15:01:12_hourly       176M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_16:02:03_hourly       180M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_17:01:07_hourly       185M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_18:02:34_hourly       180M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_19:00:20_hourly       179M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_20:01:02_hourly       187M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_21:01:59_hourly       182M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_22:01:19_hourly       180M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-26_23:00:44_hourly       178M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_00:01:12_daily          0B      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_00:01:12_hourly         0B      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_01:01:47_hourly       186M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_02:01:57_hourly       181M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_03:01:53_hourly       185M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_04:01:47_hourly       192M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_05:02:00_hourly       198M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_06:00:58_hourly       174M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_07:00:29_hourly       177M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_08:01:39_hourly       178M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_09:01:16_hourly       180M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_10:02:23_hourly       179M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_11:01:49_hourly       178M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_12:02:56_hourly       123M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_12:15:46_frequently   101M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_12:31:10_frequently   104M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_12:45:53_frequently   106M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_13:00:54_hourly         0B      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_13:00:54_frequently     0B      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_13:15:45_frequently   105M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_13:31:00_frequently   106M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_13:45:45_frequently   103M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_14:00:45_hourly       603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_14:00:45_frequently   603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_14:16:06_frequently   102M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_14:30:40_frequently   101M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_14:46:35_frequently   102M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_15:01:45_hourly       603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_15:01:45_frequently   603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_15:16:37_frequently   102M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_15:30:55_frequently   102M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_15:45:16_frequently   102M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_16:00:51_hourly       603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_16:00:51_frequently   603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_16:16:40_frequently   104M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_16:31:47_frequently   105M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_16:45:48_frequently   105M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_17:01:12_hourly       585K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_17:01:12_frequently   603K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_17:15:46_frequently   102M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_17:31:04_frequently   107M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_17:46:22_frequently   103M      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_18:00:56_hourly       384K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_18:00:56_frequently   384K      -     32.0G  -
system/backups-by-snapshot/syncoid/homeassistant@autosnap_2022-12-27_18:16:29_frequently     0B      -     32.0G  -

So far, so good

So far, so good. I'm liking this solution. It is very specific to this one filesystem, and I am sure I could adopt it to any others I need to replicate like this.

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